LRU memory in Alpha server by default set to a negative value in MacOS

[prashant-shahi]

What version of Dgraph are you using?

Dgraph version   : v1.2.0
Dgraph SHA-256   : ff6a20cdd76a03a37f916b039b82bf0120b1d8ffb89edba90cecbac0652cc207
Commit SHA-1     : 24b4b7439
Commit timestamp : 2020-01-27 15:53:31 -0800
Branch           : HEAD
Go version       : go1.13.5

What is the hardware spec (RAM, OS)?

MacOS Catlina version 10.15.2
Memory: 8 GB 1600 MHz DDR3

Steps to reproduce the issue (command/config used to run Dgraph).

curl -sSf https://get.dgraph.io | bash

$ /usr/local/bin/dgraph alpha
[Decoder]: Using assembly version of decoder

2020/02/06 02:04:39 LRU memory (--lru_mb) must be at least 1024 MB. Currently set to: -1.000000

For more information on --lru_mb please read https://docs.dgraph.io/deploy/#config

Expected behaviour and actual result.

Expected to bring up the Alpha server by setting LRU memory to 25% of the total memory as it is done in Linux.

[MichelDiz]

This must be some characteristic of mac OS. As the --lru_mb isn't defined at all by the binary or anything.

[animesh2049]

I think this is expected behavior, does it cause any problem on macOS? @prashant-shahi

[prashant-shahi]

@animesh2049 It doesn't work with the default settings on macOS as it does on Linux.
But yeah, it works when I manually set --lru_mb.

[minhaj-shakeel]

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